Hot-water heater.



G. C. GILL. P. S.SINCLA1R & P. 1. MDAKLER. HOT WATER HEATER. APmggmon FILED 111AY6.1915.

Patented Nov. 13, 1917 2 SHEETS-SHEET 1- WITNESS lN YEN TOR51 ATTORNEYS? G. C. GILL, P. S. SINCLAlR & P. MOAKLER.

HOT WATER HEATER.

APPLlCATION mu) MAYG. 1915.

1,246,084. Patented'Nov. 13, 1917.

WITNESS George ENTORS.

Pez gmw and A TTORNE YS.

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e drawn] ilfl'hu 'ihese planes but that each of them is twisted more or less so as to stand in a spiral relation to the vertical axis of the casing, that is to say, the opposite ends of the heating coils or units are twisted or rotated through any suitable arc, in the form shown they are twisted or turned through an arc of 180. The'twisting arrangement is effected by any suitable means whereby the coils are partially nested or interlocked with relation to each other, as clearly shown in Figs. 1 and i.

The distance apart of the projections 11 and the diameter of the coils which are attached to these projections is such that when the manifolds 7 and 8 are turned relative to each other in horizontal or parallel planes. the coils 12 will he twisted about the axis of the casing, causing the turns of the coils to slightly nest one within the other. as shown. This nesting of the coils or heating units serves or acts as a baffle plate to the free upward flow of the heated gases or products of combustion from the burner 13 in their passage through the casing l and the outlet cap 3. By reason of this nesting or spiral arrangement of the heating coils with relation to each other which causes them to act as a baffle plate, a very high degree of heating eliiciency is obtained by reason of the fact that more of the heatunits contained in the fuel is'impartcd to the water contained in the coils. This twisting of the coils with relation to the vertical axis serves to place them very much closer together and thus a greater amount of heating surface is obtained in a given space than is the case where the coils are not nested. The lower manifold 7 is formed with a centrally located projection lei for attaching an inlet pipe thereto. This projection is provided with a suitable plug 15 for closing the same whn it is not in use. he centrally located pipe connection is to be used only when it is inconvenient to make the usual pipe connections at the side of the casing, as indicated in Figs. 1 and at, as oocasions very often arise where the construction of the building or the location of the inlet cannot be conveniently attached at the side of the heater; a central connection can then often be conveniently made by means of the threaded projcctions'i-i which are normally closed by the plug 15. A. drip plate is shown at 3.6 that is located ea ape .1

suitable below the burner, in order to collect any water of condensation that may drip from the coils 12 when the burner is first lighted.

It may be mentioned that the gas inlet pipe 17 is not located exactly in the axial line of the casing but at one side so that the purpose of making them serve as a bafile plate the heated gases are brought directly into contact with the coils. It will be observed that in twisting the coiled pipes or units about each other and in spiral relationship to the axis of the casing the inner sides of the coils or turns of each coiled pipe are brought into direct engagement with each other in the same manner as the inner sides of the strands of a rope and close to the axis of the casing. The center portion. of the coiled pipes therefore, practically closes the space about the axis of the casing and results in obtaining a mass of heating coils that are arranged closely to gether and which effectively serve as a baffle to the free up 'ard flow of the heatedv products of combustion and thereby greatly increasing the elliciency of the heater. These twisted coiled pipes. it will be observed, sub.- stantiullv fill the interior space of the inclosing casing from the central axial line to the inner surface of the inclosing casin If a halile plate is used the heated gases are partially cut off from contact with the coils, whereas, in the present invention the coils themselves act as a battle device. Fig. 2 clearly shows the heating coils in Contact with each other-in a partial nested relation, while the spinal arrangement is clearly shown in liig. 1.

in th preferred form of heater shown in Fig. l the manifolds 7 and 8' are attached to the casing l and cap 3 in the same manner as already described in connection with i. in this form of heater the lower manifold .7 is not provided with a central projccl'ion for an inlet pipe connection as shown in Fig. l. The upper manifold 8' is formed with an upward extension 14 for connecting an outlet pipe thereto. This extension, as'shown is located at one side of the center and parallel with the axis of the casing and is secured to the cap 3 by means of the nut 10. This arrangement is more convenient for attaching. the outlet hot .i'ater pipe than that shown in Fig. 1. This upper manifold is not provided with a centrally located projection like that shown 1 1.. or, in other words the arrangement o in st and outletv pipe-connections i e same as those usually employed in the necessary pipe connections to the usual 1 tan;

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by the twisted coils will serve to retard the free upward movement of the heated gases through the casing. 1

8. A hot water heater comprising in combination with an inclosing casing, a burner at the lower end of the casing, a plurality of coiled water heating pipes located in the incl-osing casing, a transversely arranged manifold located at the upper and lower ends, respectively, of the said casing and to which they are attached, the manifolds having spaced hollow projections on the opposite sides of the same for attaching the ends of the coiled water heating pipes to the manifolds, each coiled water heating pipe having one end attached to a projection on one side of a manifold and its other end attached to a projection on the oppositely considered side of the other manifold for the purpose of arranging said pipesin a spiral relation to the axis of the inclosing casing and for causing the turns of said pipes toengage in a rope-like nanner to cause said pipes to serve as a bafile to the free upward flow oi": the heated products of combustion from the burner, all constructed and arranged for the purpose herein set forth.

9. A hot-water heater comprising in combination with an inclosing casing, of a plurality of coiled water heating pipes twisted about each other in rope-like manner with the inside portions of the turns of said pipes being in contacting relation but leaving an open centrally located space between the turns of said coils, inlet and outlet manifolds to which the ends of the said coils are connected, a burner at the lower end of the casing, said twisted arrangement of theheating pipes resulting in substantially filling the inclosing casing to serve as abafiie to the free upward flow of the heated products of combustion.

' GEORGE O. GILL.

PETER S. SINCLAIR. PATRICK J. MOAKLER. 

